Patrick Waldron, a spokesperson for CN Rail, said the train derailed around 1 a.m. MT Sunday near Peers in Yellowhead County, about 180 kilometres west of Edmonton.
Waldron said the train with 137 cars was headed eastbound from Prince George to Edmonton when it derailed.
One of the derailed cars is a dangerous goods tanker carrying sulphur dioxide. The other 12 cars are loaded with lumber cars.
The dangerous goods car is upright and not leaking, said Waldron, who added there are no environmental concerns or threats to the public at this time.
CN Rail crews are on the scene. The cause of the derailment remains under investigation.
This most recent derailment comes only two weeks after 13 rail cars carrying crude oil and liquefied petroleum gas derailed near Gainford, Alta.
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